MCQOPTIONS

Explore topic-wise MCQs in Chemical Reaction Engineering.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Reaction Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.	If rate of a zero order reaction is 10 ( frac{mol}{m^3 s} ) and reaction time is 5s, then the value of rate constant is ____
A.	1 s<sup>-1</sup>
B.	2 s<sup>-1</sup>
C.	5 s<sup>-1</sup>
D.	10 s<sup>-1</sup>
Answer» C. 5 s<sup>-1</sup>

2.	For a first order reaction, the rate constant is expressed in terms of initial concentration CAo and final concentration CA as ____
A.	C<sub>A</sub> = C<sub>Ao</sub> k
B.	C<sub>A</sub> = C<sub>Ao</sub> e<sup>-kt</sup>
C.	C<sub>A</sub> = C<sub>Ao</sub> kt
D.	C<sub>A</sub> = C<sub>Ao</sub> e<sup>kt</sup>
Answer» C. C<sub>A</sub> = C<sub>Ao</sub> kt

3.	Which among the following is true for liquid phase reactions of order n?
A.	ln( ( frac{-dC}{dt} )) = lnk + n(lnC)
B.	ln( ( frac{-dC}{dt} )) = lnk + lnC
C.	ln( ( frac{-dC}{dt} )) = nlnk + lnC
D.	ln( ( frac{-dC}{dt} )) = lnk + ( frac{lnC}{n} )
Answer» B. ln( ( frac{-dC}{dt} )) = lnk + lnC

4.	For a reaction with negative order n, which one of the following is true about reaction rate constant?
A.	k = (-r<sub>A</sub>)
B.	k = 1
C.	k = ( frac{-r_A}{C_A^n} )
D.	k = (-r<sub>A</sub>) C<sub>A</sub><sup>n</sup>
Answer» E.

5.	For any order n, the rate constant is expressed as ____
A.	(-r<sub>A</sub>)
B.	(-r<sub>A</sub>) C<sub>A</sub><sup>n</sup>
C.	(-r<sub>A</sub>) C<sub>A</sub>
D.	( frac{-r_A}{C_A^n} )
Answer» E.

6.	The rate constant is a ____
A.	Linear function of frequency factor
B.	Exponential function of frequency factor
C.	Logarithmic function of frequency factor
D.	Sinusoidal function of frequency factor
Answer» B. Exponential function of frequency factor

7.	For a first order reaction, the rate constant as a function of half life is given as ____
A.	( frac{0.6931}{k} )
B.	0.6931 k
C.	0.6931
D.	( frac{k}{0.6931} )
Answer» B. 0.6931 k

8.	Which among the following graphs represents a zero order reaction?
A.	<img alt="The graphs represents a zero order reaction - option a" class="alignnone size-full wp-image-282392" height="327" sizes="(max-width: 459px) 100vw, 459px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3a.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3a.png 459w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3a-300x214.png 300w" width="459"/>
B.	<img alt="The graphs represents a zero order reaction - option b" class="alignnone size-full wp-image-282394" height="332" sizes="(max-width: 477px) 100vw, 477px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3b.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3b.png 477w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3b-300x209.png 300w" width="477"/>
C.	<img alt="The graphs represents a zero order reaction - option c" class="alignnone size-full wp-image-282395" height="327" sizes="(max-width: 476px) 100vw, 476px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3c.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3c.png 476w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3c-300x206.png 300w" width="476"/>
D.	<img alt="The graphs represents a zero order reaction - option d" class="alignnone size-full wp-image-282396" height="324" sizes="(max-width: 465px) 100vw, 465px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3d.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3d.png 465w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3d-300x209.png 300w" width="465"/>
Answer» B. <img alt="The graphs represents a zero order reaction - option b" class="alignnone size-full wp-image-282394" height="332" sizes="(max-width: 477px) 100vw, 477px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3b.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3b.png 477w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3b-300x209.png 300w" width="477"/>

9.	Which of the following theories does not propose the temperature dependence of rate constant?
A.	Arrhenius theory
B.	Collision theory
C.	Transition state theory
D.	Bohr s theory
Answer» E.

10.	The value of rate constant for a zero order reaction is obtained by the plot between ____
A.	Concentration vs time
B.	Concentration vs rate
C.	Rate vs time
D.	Concentration vs rate
Answer» B. Concentration vs rate